This ISU requires students to make a Time Capsule that has artifacts from each of the 5 units (1900-1918, 1919-1939, 1939-1945, 1945-1982, 1982-present). Students must enclose all artifacts in a box that is appropriate for a time capsule. The writing component requires students to describe the artifact, explain its significance, and describe the object through the lens of another Historical Thinking Concept (i.e. Continuity and Change, Cause and Consequence, or Historical Perspective).